[As of Sept 8/15 this answer is defunct, but I'll it around for anyone interested in the historical tidbits...]
As noted here and at the end here that connector isn't good for much except potentially a proprietary screen from the Foundation, since there aren't any (public) drivers for it.
There are a few pics around of a demo screen ( ) that was on display by the Foundation (and Farnell?) at a convention last year, but after searching the Foundation's own blog (for "DSI"), where stuff like this is announced, it seems that screen is still not for sale.
Also at the end of that second Foundation forum there is a quick reference to EMI (electromagnetic interference) problems, so at this point it could turn out the whole thing is infeasible.